Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 1882
interventional 1444
Observational 407
Registry 31

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 805
Drug|placebo 218
Biological 196
Other 37
Behavioral 34
Biological|Drug 31
Biological|Drug|placebo 22
Biological|placebo 13
Procedure 13
Dietary Supplement 11
Device 10
Drug|Other 6
Behavioral|Other 5
Biological|Other 5
Device|Drug 5
Biological|Procedure 4
Diagnostic Test 4
Dietary Supplement|placebo 4
Other|Procedure 3
Behavioral|Biological 2
Behavioral|Drug 2
Dietary Supplement|Drug 2
Drug|Procedure 2
Behavioral|Diagnostic Test 1
Biological|Drug|Other 1
Biological|Drug|Procedure 1
Biological|Other|placebo 1
Device|Other 1
Diagnostic Test|Drug 1
Dietary Supplement|Drug|Procedure 1
Dietary Supplement|Other 1
Drug|Other|Procedure 1
Genetic 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 281
NA 211
China 107
Korea, Republic of 44
United States|Puerto Rico 42
Taiwan 39
Japan 34
France 30
Canada 27
Egypt 25
India 25
Belgium 22
Germany 22
Spain 22
United Kingdom 19
Iran, Islamic Republic of 14
Russian Federation 14
Australia 13
Brazil 13
Thailand 13
Italy 12
Netherlands 12
United States|Canada 12
Austria 8
New Zealand 8
Hong Kong 7
Vietnam 6
Australia|New Zealand 5
Belgium|France 5
Israel 5
Singapore 5
Sweden 5
China|Korea, Republic of 4
Denmark 4
Mexico 4
Poland 4
Switzerland 4
Belgium|Czech Republic|Hungary 3
Belgium|Germany 3
Norway 3
Pakistan 3
Philippines 3
Puerto Rico 3
Turkey 3
United States|France|Germany|Spain 3
United States|New Zealand 3
Bangladesh 2
Belgium|Czechia 2
Belgium|Germany|United Kingdom 2
Belgium|Netherlands 2
Bulgaria 2
Chile 2
China|Hong Kong 2
Cuba 2
Czech Republic 2
Czech Republic|Malaysia|Spain 2
Kazakhstan 2
Moldova, Republic of 2
Philippines|Thailand 2
Rwanda 2
Saudi Arabia 2
South Africa 2
United States|Australia|Canada|Korea, Republic of|New Zealand 2
United States|Canada|Hong Kong|New Zealand|United Kingdom 2
United States|France|Puerto Rico 2
United States|Germany 2
United States|New Zealand|Singapore|Taiwan 2
Algeria|Australia|Austria|Belgium|Bulgaria|Canada|Denmark|Finland|France|Germany|Greece|Ireland|Israel|Italy|Mexico|Netherlands|Norway|Poland|Portugal|Romania|Russian Federation|Saudi Arabia|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Argentina|Brazil|Germany|Thailand 1
Argentina|United States|Australia|Belgium|Canada|France|Germany|Hong Kong|Hungary|Italy|Korea, Republic of|Mexico|Poland|Puerto Rico|Romania|Russian Federation|Spain|Taiwan|Thailand|United Kingdom|Vietnam 1
Australia|Argentina|Canada|Mexico|New Zealand|Thailand 1
Australia|Belgium 1
Australia|Belgium|Spain 1
Australia|Belgium|Ukraine 1
Australia|Brazil|France|Poland|Russian Federation|Spain|Sweden|United Kingdom 1
Australia|Bulgaria|China|Hong Kong|Korea, Republic of|New Zealand|Singapore|Taiwan|Thailand 1
Australia|Canada|Czech Republic|France|Germany|Israel|Poland|Romania 1
Australia|Canada|France|Germany|Greece|India|Italy|Poland|Spain|Taiwan|Thailand|United Kingdom 1
Australia|Canada|Israel|New Zealand|Spain|United Kingdom 1
Australia|Czech Republic|Germany|Italy|Netherlands|Switzerland|United Kingdom 1
Australia|France|Germany|Italy|Spain|United Kingdom 1
Australia|Germany|Poland|Romania|Spain|Taiwan 1
Australia|Hong Kong|Korea, Republic of|New Zealand|Singapore|Taiwan|Thailand 1
Australia|Hong Kong|Korea, Republic of|New Zealand|Thailand 1
Australia|Hong Kong|Korea, Republic of|Taiwan|United Kingdom 1
Australia|Hong Kong|New Zealand 1
Australia|New Zealand|United Kingdom 1
Austria|Belgium|Denmark|Iceland 1
Austria|Belgium|France|Germany|Japan|Portugal|Romania|Russian Federation|Spain|Switzerland|United Kingdom 1
Austria|Belgium|France|Germany|Netherlands|Spain 1
Austria|Belgium|France|Germany|Spain|United Kingdom 1
Austria|Brazil|France|Greece|Indonesia|Italy|Turkey|United Arab Emirates 1
Austria|France|Germany|United Kingdom 1
Austria|Germany|Hungary|Poland|Romania|Spain 1
Belarus|India|Russian Federation|Thailand 1
Belgium|Bulgaria|France|Georgia|Germany|Malaysia|Moldova, Republic of|Romania|Spain|Taiwan 1
Belgium|Canada 1
Belgium|Canada|Germany|Poland|Singapore|Spain 1
Belgium|Czech Republic 1
Belgium|Czechia|Germany 1
Belgium|France|Germany|Hungary|Spain|United Kingdom 1
Belgium|France|Germany|Italy|Poland|Romania|Spain 1
Belgium|France|Germany|Italy|Poland|Spain|United Kingdom 1
Belgium|France|Germany|Netherlands|Poland|United Kingdom 1
Belgium|Germany|Hungary|Ireland|Luxembourg|Portugal|Russian Federation|United Kingdom 1
Belgium|Germany|Philippines|United Kingdom 1
Belgium|Germany|Poland|United Kingdom 1
Belgium|Germany|Thailand 1
Belgium|Mauritius|Moldova, Republic of 1
Belgium|Moldova, Republic of 1
Brazil|United States|Australia|Canada|China|France|Germany|Israel|Korea, Republic of|New Zealand|Poland|Puerto Rico|Singapore|Switzerland|Taiwan|Thailand|United Kingdom 1
Bulgaria|China|Hong Kong|Korea, Republic of|New Zealand|Poland|Taiwan|United Kingdom 1
Bulgaria|Former Yugoslavia 1
Bulgaria|Hong Kong|Italy|Netherlands|New Zealand|Taiwan|Thailand|United Kingdom 1
Bulgaria|Israel|Romania 1
Bulgaria|Romania 1
Cambodia 1
Cameroon|Côte D’Ivoire|Senegal 1
Canada|China|France|Hong Kong|Korea, Republic of|New Zealand|Spain|Taiwan|Thailand|United Kingdom 1
Canada|France|Germany 1
Canada|Germany 1
Canada|Hong Kong|Korea, Republic of|Taiwan 1
Canada|Korea, Republic of|Taiwan 1
Canada|Moldova, Republic of|Ukraine 1
Canada|Netherlands 1
Canada|United Kingdom 1
Canada|United States|Australia|Austria|Belgium|France|Germany|New Zealand|Poland|Puerto Rico|Russian Federation|Spain|United Kingdom 1
China|Hong Kong|Japan|Korea, Republic of|Philippines|Singapore 1
China|Korea, Republic of|Russian Federation 1
China|Korea, Republic of|Singapore 1
China|Netherlands 1
China|Netherlands|Poland|Romania|Turkey 1
China|United Kingdom 1
Colombia 1
Congo, The Democratic Republic of the 1
Czech Republic|France|Germany|Italy|Poland|Spain|Sweden|United Kingdom 1
Czech Republic|Korea, Republic of|Mexico 1
Czechia|Slovakia 1
Estonia|Latvia|Lithuania 1
Finland 1
Finland|Sweden 1
France|Denmark|United States|Australia|Austria|Belgium|Canada|Germany|New Zealand|Norway|Poland|Russian Federation|Spain 1
France|Georgia|Moldova, Republic of 1
France|Germany|Greece|Italy|Spain 1
France|Germany|Italy|Netherlands|Poland|Romania|Spain 1
France|Germany|United States|Belgium|Brazil|Canada|Greece|Italy|Portugal|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
France|Italy|Spain|United Kingdom 1
France|Moldova, Republic of|Romania 1
France|Netherlands|Poland 1
France|New Zealand|Poland 1
France|Spain 1
France|Sweden|United Kingdom 1
France|United States|Belgium|Brazil|Canada|Denmark|Germany|Hungary|Netherlands|Poland|Puerto Rico|Romania|Russian Federation|Sweden|United Kingdom 1
Germany|Greece|Romania 1
Germany|Hong Kong|Korea, Republic of|New Zealand|Singapore|United Kingdom 1
Germany|Israel|Mexico|United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|France|Netherlands|New Zealand|Poland|Portugal|Puerto Rico|Romania|Russian Federation|Spain|Ukraine|United Kingdom 1
Germany|Netherlands 1
Germany|Poland|Spain 1
Germany|Poland|Sweden|United Kingdom 1
Germany|Russian Federation 1
Germany|United Kingdom 1
Germany|United States|Argentina|Belgium|Chile|Egypt|Estonia|France|Greece|Italy|Kuwait|Latvia|Lebanon|Lithuania|Macedonia, The Former Yugoslav Republic of|Mexico|Oman|Pakistan|Peru|Portugal|Qatar|Romania|Serbia|Slovakia|Sweden|Switzerland|Syrian Arab Republic|Taiwan|Turkey|United Arab Emirates|Venezuela 1
Germany|United States|Australia|Austria|Canada|France|Italy|Puerto Rico|Spain|United Kingdom 1
Greece|Austria|Bulgaria|Germany|Italy|Russian Federation|Spain|Turkey 1
Hong Kong|Korea, Republic of 1
Hong Kong|Korea, Republic of|Malaysia|New Zealand|Singapore|Taiwan 1
Hong Kong|Korea, Republic of|Singapore|Taiwan|Vietnam 1
Hong Kong|New Zealand|Singapore 1
Hong Kong|Singapore|Taiwan|Thailand 1
Indonesia 1
Israel|New Zealand|Pakistan 1
Korea, Republic of|Moldova, Republic of|New Zealand|Thailand|Ukraine 1
Korea, Republic of|Russian Federation|Taiwan 1
Korea, Republic of|Taiwan 1
Korea, Republic of|Taiwan|Thailand 1
Korea, Republic of|United Kingdom 1
Lao People’s Democratic Republic|Thailand 1
Lebanon 1
Mauritius|United Kingdom 1
Morocco 1
Myanmar 1
Nepal 1
Panama 1
Puerto Rico|Spain|Sweden|Poland|United States|Australia|Austria|Belgium|Brazil|Canada|France|Germany|Israel|Netherlands|Switzerland|United Kingdom 1
Romania 1
Russian Federation|Sweden 1
Russian Federation|United States|Argentina|Australia|Belgium|Chile|Finland|France|Greece|Hong Kong|Italy|Japan|Korea, Republic of|Mexico|Netherlands|New Zealand|Singapore|Taiwan|United Kingdom 1
Slovakia 1
Spain|Australia|Canada|Czechia|Finland|Italy 1
Spain|Sweden|Switzerland|Romania|United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Czech Republic|Denmark|France|Germany|Greece|Hungary|Israel|Norway|Poland|Portugal|Puerto Rico|United Kingdom 1
Spain|Switzerland|United Kingdom 1
Spain|United States|Australia|Belgium|Brazil|Canada|Czech Republic|France|Germany|Hong Kong|India|Israel|Italy|Korea, Republic of|Netherlands|Pakistan|Poland|Puerto Rico|Romania|Russian Federation|Slovakia|Taiwan|Thailand|Ukraine|United Kingdom 1
Taiwan|United States|Brazil|Canada|France|Greece|Hong Kong|India|Indonesia|Philippines|Poland|Russian Federation|Singapore|South Africa|Thailand|Turkey|United Kingdom 1
Thailand|Australia|Brazil|China|Hong Kong|Korea, Republic of|New Zealand|Russian Federation|Singapore|Taiwan 1
Thailand|Australia|Hong Kong|Korea, Republic of|New Zealand 1
Turkey|United States|Austria|Bulgaria|Canada|Czech Republic|Germany|Greece|Hungary|New Zealand|Poland|Romania|Serbia|Spain 1
United Kingdom|United States|Australia|Bulgaria|Canada|Czech Republic|France|Germany|Greece|Italy|Netherlands|New Zealand|Poland|Spain|Turkey 1
United States|Argentina|Australia|Austria|Brazil|Canada|Denmark|France|Germany|Israel|Italy|Poland|Russian Federation|Spain|Switzerland|United Kingdom 1
United States|Argentina|Australia|Austria|Canada|Denmark|France|Germany|Greece|Ireland|Italy|Korea, Republic of|Mexico|New Zealand|Poland|Spain|Sweden|Taiwan|United Kingdom 1
United States|Argentina|Australia|Austria|Canada|France|Germany|Israel|Italy|Poland|Puerto Rico|Spain|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Canada|France|Germany|Italy|Puerto Rico|Russian Federation|Spain|United Kingdom 1
United States|Argentina|Australia|Belgium|Canada|France|Germany|Hong Kong|Hungary|India|Italy|Korea, Republic of|Mexico|Poland|Romania|Russian Federation|Spain|Taiwan|Thailand|Turkey|United Kingdom|Vietnam 1
United States|Argentina|Australia|Brazil|Canada|France|India|Italy|Mexico|Poland|Russian Federation|South Africa|Turkey 1
United States|Argentina|Australia|Brazil|France|Italy|Korea, Republic of|Spain|Taiwan 1
United States|Argentina|Australia|Canada|France|Israel|Italy|Poland|Puerto Rico|Russian Federation|Spain|United Kingdom 1
United States|Argentina|Austria|Belgium|Brazil|Bulgaria|France|Germany|Netherlands|Poland|Portugal|Puerto Rico|Slovakia|Spain|Turkey 1
United States|Argentina|Belgium|Brazil|Canada|Korea, Republic of|Taiwan|United Kingdom 1
United States|Argentina|Belgium|Canada|Germany|Greece|India|Israel|Korea, Republic of|Poland|Romania|Russian Federation|Taiwan|United Kingdom 1
United States|Argentina|Canada|Puerto Rico 1
United States|Argentina|France|Germany|Hungary|Spain 1
United States|Australia|Austria|Belgium|Brazil|Canada|Germany|Mexico|Puerto Rico|Switzerland 1
United States|Australia|Austria|Belgium|Brazil|France|Germany|Ireland|Mexico|Poland|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|France|Germany|Israel|New Zealand|Norway|Poland|Portugal|Russian Federation|United Kingdom 1
United States|Australia|Austria|Brazil|Canada|France|Germany|Italy|Mexico|Poland|Puerto Rico|Spain|United Kingdom 1
United States|Australia|Austria|Canada|France|Germany|Italy 1
United States|Australia|Austria|Canada|France|Germany|Italy|Puerto Rico|Spain 1
United States|Australia|Belgium|Brazil|Canada|Czech Republic|Egypt|France|Germany|Greece|India|Israel|Italy|Korea, Republic of|Pakistan|Poland|Puerto Rico|Romania|Russian Federation|Slovakia|Spain|Taiwan|Ukraine 1
United States|Australia|Belgium|Bulgaria|China|Germany|Israel|Italy|Poland|Russian Federation|Ukraine|United Kingdom 1
United States|Australia|Belgium|Canada|France|Germany|Greece|Italy|New Zealand|Portugal|Spain|United Kingdom 1
United States|Australia|Belgium|Canada|France|Germany|India|Italy|Korea, Republic of|Poland|Puerto Rico|Taiwan|Thailand|United Kingdom 1
United States|Australia|Belgium|Canada|France|New Zealand|Singapore|South Africa|Vietnam 1
United States|Australia|Belgium|Canada|Germany|New Zealand|Puerto Rico|United Kingdom 1
United States|Australia|Belgium|France|Germany|Hungary|Italy|Poland|Puerto Rico|Romania|Spain|Taiwan|Turkey|United Kingdom 1
United States|Australia|Belgium|Germany|Italy|Malaysia|Romania|Russian Federation|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Australia|Belgium|Germany|Puerto Rico|Spain|Taiwan 1
United States|Australia|Brazil|Canada|China|Germany|Korea, Republic of|New Zealand|Russian Federation|Spain|Sweden|Switzerland|United Kingdom 1
United States|Australia|Brazil|Canada|Greece|Hong Kong|India|Indonesia|Italy|Korea, Republic of|Malaysia|Philippines|Poland|Russian Federation|Singapore|Taiwan|Thailand|Turkey 1
United States|Australia|Brazil|China|France|Germany|Hong Kong|Korea, Republic of|New Zealand|Russian Federation|Singapore|Taiwan|Thailand 1
United States|Australia|Brazil|France|Greece|Italy|Poland|Puerto Rico|Spain|Taiwan|United Kingdom 1
United States|Australia|Bulgaria|Canada|Czech Republic|France|Germany|Greece|Italy|Netherlands|New Zealand|Poland|Spain|Turkey|United Kingdom 1
United States|Australia|Canada|China|France|Germany|India|Israel|Korea, Republic of|Latvia|Malaysia|New Zealand|Poland|Russian Federation|Singapore|Spain|Taiwan|Thailand|Turkey|United Kingdom|Vietnam 1
United States|Australia|Canada|China|France|Israel|New Zealand|Singapore|Taiwan|Thailand|United Kingdom 1
United States|Australia|Canada|China|France|Korea, Republic of|Singapore|Taiwan|Thailand 1
United States|Australia|Canada|Denmark|France|Italy 1
United States|Australia|Canada|France 1
United States|Australia|Canada|France|Germany|Greece|Hong Kong|India|Italy|Korea, Republic of|Netherlands|Poland|Portugal|Romania|Singapore|Spain|Taiwan|Turkey|United Kingdom 1
United States|Australia|Canada|France|Germany|Greece|Italy|Pakistan|Spain 1
United States|Australia|Canada|France|Germany|Hong Kong|Italy|Korea, Republic of|Netherlands|Singapore|Taiwan 1
United States|Australia|Canada|France|Germany|Hong Kong|New Zealand|Poland|Singapore|Taiwan|United Kingdom 1
United States|Australia|Canada|France|Germany|Italy|New Zealand|Puerto Rico|Spain 1
United States|Australia|Canada|France|Germany|New Zealand|Puerto Rico|Spain|United Kingdom 1
United States|Australia|Canada|France|Germany|New Zealand|Switzerland|United Kingdom 1
United States|Australia|Canada|France|New Zealand|Poland|Slovakia 1
United States|Australia|Canada|France|Puerto Rico 1
United States|Australia|Canada|Germany|Mexico|New Zealand|Puerto Rico|Romania|Russian Federation|Spain|Ukraine|United Kingdom 1
United States|Australia|Canada|Germany|Netherlands|New Zealand|Switzerland|United Kingdom 1
United States|Australia|Canada|New Zealand 1
United States|Australia|Canada|New Zealand|Puerto Rico 1
United States|Australia|Canada|New Zealand|United Kingdom 1
United States|Australia|China|Hong Kong|Korea, Republic of|New Zealand|United Kingdom 1
United States|Australia|Germany|New Zealand|Poland 1
United States|Australia|Hong Kong|New Zealand|Philippines|Singapore|Taiwan|Thailand 1
United States|Australia|New Zealand 1
United States|Australia|Puerto Rico 1
United States|Austria|Belgium|Canada|Czech Republic|France|Germany|Italy|Poland|Spain|United Kingdom 1
United States|Austria|Belgium|Canada|France|Germany|Japan|Korea, Republic of|Portugal|Romania|Russian Federation|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Austria|Belgium|Canada|France|Germany|Japan|Portugal|Puerto Rico|Spain|Switzerland|United Kingdom 1
United States|Austria|Belgium|Canada|France|Switzerland|United Kingdom 1
United States|Austria|Belgium|France|Germany|Netherlands|Poland|United Kingdom 1
United States|Austria|Brazil|Canada|France|Germany|Italy|Mexico|Puerto Rico|Spain|United Kingdom 1
United States|Austria|Canada|France|Germany|Netherlands|Puerto Rico|United Kingdom 1
United States|Austria|Canada|France|Germany|Romania 1
United States|Austria|Canada|France|Germany|Spain 1
United States|Belgium 1
United States|Belgium|Brazil|Canada|China|Czechia|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Malaysia|Poland|Russian Federation|Spain|Thailand|Turkey|United Kingdom 1
United States|Belgium|Brazil|Canada|Colombia|France|Germany|Italy|Korea, Republic of|Russian Federation|Spain|Switzerland|United Kingdom 1
United States|Belgium|Bulgaria|France|Germany|Puerto Rico 1
United States|Belgium|Canada|China|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Malaysia|Poland|Russian Federation|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Belgium|Canada|Czechia|Denmark|Germany|Japan|Netherlands|Spain|Sweden|Switzerland|United Kingdom 1
United States|Belgium|Canada|France|Germany|Hungary|Korea, Republic of|Puerto Rico|Spain 1
United States|Belgium|Canada|France|Germany|Poland|Russian Federation 1
United States|Belgium|Canada|Germany|Japan|Puerto Rico|Russian Federation|Spain|United Kingdom 1
United States|Belgium|Canada|Hong Kong|India|Korea, Republic of|New Zealand|Romania|Russian Federation|Taiwan 1
United States|Belgium|Germany|Italy|Taiwan 1
United States|Belgium|Germany|Puerto Rico|Spain 1
United States|Belgium|Netherlands|Puerto Rico 1
United States|Brazil|France|Germany|Italy|Spain|Switzerland|United Kingdom 1
United States|Brazil|France|New Zealand|Sweden 1
United States|Brazil|Mexico|Puerto Rico|South Africa 1
United States|Brazil|South Africa 1
United States|Bulgaria|Canada|Czechia|France|Greece|Hungary|Ireland|Israel|Italy|Poland|Portugal|Puerto Rico|Romania|Russian Federation|Spain|Taiwan|United Kingdom|Vietnam 1
United States|Bulgaria|Canada|France|Germany|Poland|Puerto Rico|Russian Federation|Spain|United Kingdom 1
United States|Bulgaria|France|Poland|Romania|Spain|Turkey 1
United States|Canada|China|France 1
United States|Canada|France|Germany|Greece|Italy|Poland|Singapore|Spain|Taiwan|Turkey 1
United States|Canada|France|Germany|Italy|Puerto Rico|Spain 1
United States|Canada|France|Germany|Italy|Spain|United Kingdom 1
United States|Canada|France|Germany|Portugal|Puerto Rico|Spain|United Kingdom 1
United States|Canada|Germany 1
United States|Canada|Germany|Greece|Italy|Korea, Republic of|Poland|Puerto Rico|Spain|Sweden 1
United States|Canada|Germany|Netherlands|Puerto Rico 1
United States|Canada|Germany|Poland|United Kingdom 1
United States|Canada|Hong Kong|Indonesia|Philippines|Singapore|Taiwan|Thailand 1
United States|Canada|Hong Kong|Italy|Korea, Republic of|New Zealand|Taiwan|United Kingdom 1
United States|Canada|Hong Kong|Italy|Korea, Republic of|Spain|Taiwan|United Kingdom 1
United States|Canada|Italy|Korea, Republic of|Netherlands|New Zealand 1
United States|Canada|Italy|Korea, Republic of|New Zealand|Romania 1
United States|Canada|Korea, Republic of|Puerto Rico|Taiwan 1
United States|Canada|New Zealand 1
United States|Canada|United Kingdom 1
United States|China|Korea, Republic of|Singapore|Taiwan 1
United States|Czechia|France|Germany|Hungary|Poland|Puerto Rico|Spain|United Kingdom 1
United States|France 1
United States|France|Germany|New Zealand 1
United States|France|Germany|New Zealand|Spain 1
United States|France|Germany|Puerto Rico|United Kingdom 1
United States|France|Greece|Italy|Puerto Rico|Spain|United Kingdom 1
United States|Germany|Netherlands|Poland|Puerto Rico|Slovakia 1
United States|Germany|Spain|United Kingdom 1
United States|India|Korea, Republic of|Romania|Taiwan 1
United States|Japan|Korea, Republic of|Taiwan 1
United States|Korea, Republic of|Spain|Thailand|Turkey|United Kingdom 1
United States|New Zealand|Spain 1
United States|United Kingdom 1
Zambia 1

Sites per Study

Site_count Study_Count
1 739
2 81
3 54
4 49
5 28
6 24
7 28
8 30
9 18
10 21
11 22
12 17
13 7
14 13
15 18
16 15
17 8
18 16
19 14
20 12
21 15
22 9
23 9
24 12
25 12
26 7
27 5
28 11
29 2
30 1
31 3
32 9
33 2
34 4
35 5
36 2
37 5
38 7
39 5
40 1
41 3
42 6
43 6
44 3
45 3
46 1
48 5
49 3
51 2
52 1
53 3
54 1
55 3
56 1
60 1
61 1
62 2
63 3
66 3
67 4
68 2
71 3
73 3
74 1
75 1
76 1
77 1
80 1
81 1
82 1
86 1
87 3
91 1
93 2
97 1
98 1
100 1
101 1
102 1
104 1
106 1
107 1
109 1
112 1
113 1
114 1
116 2
119 1
123 1
124 1
132 1
142 1
144 1
147 1
171 1
184 1
187 1
191 1
210 1
227 1

Phase

Phase Study_Count
Phase 2 358
Phase 3 353
Phase 4 330
N/A 170
Phase 1 147
Phase 1/Phase 2 47
Phase 2/Phase 3 34
Early Phase 1 5

Number of Arms

Number_of_Arms Count_of_Studies
1 314
2 526
3 197
4 114
5 37
6 41
7 14
8 16
9 7
10 9
11 2
12 5
13 1
14 2
18 2
20 1
22 2
NA 154

Number of Updates

Count of Versions Count of Studies
1 123
2 150
3 110
4 115
5 99
6 99
7 62
8 66
9 60
10 54
11 38
12 26
13 35
14 29
15 23
16 14
17 13
18 21
19 13
20 13
21 15
22 14
23 7
24 9
25 6
26 17
27 12
28 10
29 7
30 5
31 8
32 8
33 4
34 5
35 8
36 5
37 9
38 3
39 3
40 5
41 2
42 9
43 2
44 5
45 3
46 4
47 1
48 3
49 4
50 2
51 3
52 2
53 3
54 1
55 1
57 1
58 2
59 3
60 1
61 1
62 2
64 3
65 1
66 3
68 1
69 1
71 1
72 1
73 1
74 2
75 1
76 2
77 1
78 1
80 2
81 1
82 1
83 1
84 1
85 7
87 2
88 1
89 2
90 2
91 4
92 2
93 1
94 1
97 1
99 1
101 1
103 3
110 1
117 1
121 1
125 1
134 2
150 2
161 1
173 1
254 1
589 1
904 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 20863 1321 15.793338
Contacts/Locations 7337 1150 6.380000
Recruitment Status 2579 1176 2.193027
Study Design 2211 1071 2.064426
Outcome Measures 1915 823 2.326853
Arms 1595 784 2.034439
Interventions 1595 784 2.034439
Study Description 1542 676 2.281065
None (earliest Version on record) 1444 1444 1.000000
Study Identification 1381 695 1.987050
Eligibility 1370 699 1.959943
Sponsor/Collaborators 1253 676 1.853550
More Information 1068 353 3.025496
Oversight 727 556 1.307554
References 661 422 1.566351
Conditions 524 331 1.583082
Results 476 476 1.000000
IPDSharing 297 228 1.302632
Baseline Characteristics 283 205 1.380488
Reported Adverse Events 245 183 1.338798
Participant Flow 205 167 1.227545
Results Submission Events 80 80 1.000000
Documents 70 65 1.076923

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 22.0 2.000 4.00000 9.00000 2.0000 10.00 6.0000 5.000
1st Qu. 25.0 50.000 22.00000 30.00000 37.0000 66.50 100.0000 58.000
Median 26.0 136.000 37.00000 40.00000 75.0000 120.50 193.5000 135.000
Mean 35.4 1056.112 48.93878 61.33333 132.3598 219.50 354.0116 1572.846
3rd Qu. 52.0 309.000 60.00000 64.00000 154.0000 229.75 451.7500 308.000
Max. 52.0 50000.000 240.00000 548.00000 2000.0000 1224.00 5000.0000 221855.000

Trial Group Type

group_type Group_Count
Experimental 2431
Active Comparator 618
Placebo Comparator 212
NA 154
Other 94
No Intervention 87
Sham Comparator 4

Intervention Model

intervention_model Study_Count
Parallel Assignment 951
Single Group Assignment 416
NA 28
Crossover Assignment 19
Sequential Assignment 18
Factorial Assignment 12

Primary Purpose

primary_purpose Study_Count
Treatment 1086
Prevention 227
NA 26
Diagnostic 23
Health Services Research 20
Other 20
Basic Science 17
Screening 16
Supportive Care 8
Device Feasibility 1

Observational Studies

Studies by Country

Country Study_Count
United States 71
NA 65
China 38
France 21
Taiwan 15
Korea, Republic of 14
Spain 11
Australia 10
Japan 10
Germany 9
Netherlands 9
Canada 8
Egypt 8
Brazil 7
Hong Kong 6
India 6
United Kingdom 5
United States|Puerto Rico 5
Austria 4
Denmark 4
Italy 4
Mexico 4
Russian Federation 4
Switzerland 4
United States|Canada 4
Israel 3
Turkey 3
Zambia 3
Belgium 2
Bulgaria 2
Greece 2
Panama 2
Senegal 2
Singapore 2
Australia|France|Hong Kong|Italy|Korea, Republic of|New Zealand|Russian Federation|Singapore|Taiwan|Thailand 1
Austria|Bahrain|Bangladesh|Bosnia and Herzegovina|Bulgaria|China|Egypt|France|Germany|Hong Kong|India|Indonesia|Ireland|Jordan|Korea, Republic of|Lebanon|Macedonia, The Former Yugoslav Republic of|Morocco|New Zealand|Pakistan|Poland|Portugal|Romania|Saudi Arabia|Thailand|United Arab Emirates|United Kingdom 1
Austria|Belgium|France|Greece|Israel|Italy|Poland|Portugal|Switzerland 1
Austria|Brazil|Canada|Croatia|France|Hungary|Macedonia, The Former Yugoslav Republic of|Mexico|Morocco|Poland|Romania|Serbia|Slovenia|Sweden 1
Austria|Bulgaria|China|France|Germany|Greece|Italy|Korea, Republic of|New Zealand|Poland|Portugal|Romania|Taiwan|Thailand|United Kingdom 1
Belgium|Egypt|Estonia|France|Germany|Greece|Hungary|Ireland|Italy|Kuwait|Lebanon|Macedonia, The Former Yugoslav Republic of|Morocco|Oman|Pakistan|Portugal|Qatar|Romania|Saudi Arabia|Serbia|Sweden|Switzerland|Syrian Arab Republic|Taiwan|Turkey|United Arab Emirates|United Kingdom 1
Belgium|France|Germany|Netherlands|Switzerland|United Kingdom 1
Belgium|Ireland|Italy|United Kingdom 1
China|United States|Argentina|Brazil|Canada|Colombia|Czechia|France|Germany|Greece|India|Italy|Korea, Republic of|Mexico|Philippines|Poland|Portugal|Romania|Russian Federation|Singapore|Spain|Taiwan|Thailand|Turkey 1
Colombia 1
Czech Republic 1
Ethiopia 1
France|Italy 1
Gambia|Senegal 1
Georgia 1
Hungary 1
Iceland 1
Kenya 1
Korea, Republic of|Russian Federation 1
Kuwait|Lebanon|Albania|Algeria|Bahrain|Belgium|Bosnia and Herzegovina|Brazil|Egypt|Greece|Hungary|India|Iran, Islamic Republic of|Italy|Korea, Republic of|Macedonia, The Former Yugoslav Republic of|Morocco|Pakistan|Poland|Portugal|Qatar|Romania|Serbia|Slovakia|United Arab Emirates 1
Moldova, Republic of 1
Myanmar 1
Netherlands|United Kingdom 1
Poland 1
Puerto Rico 1
Romania|United States|Argentina|Australia|Austria|Belgium|Canada|Finland|France|Germany|Greece|Italy|Korea, Republic of|Mexico|Netherlands|New Zealand|Poland|Puerto Rico|Spain 1
Romania|United States|Argentina|Brazil|China|France|Greece|India|Italy|Peru|Philippines|Poland|Russian Federation|Singapore|Spain|Taiwan|Thailand|United Kingdom 1
Serbia 1
Slovenia 1
Sweden 1
Thailand 1
Uganda 1
Ukraine 1
United States|Argentina|Australia|Brazil|Canada|Denmark|France|Germany|Ireland|Italy|Japan|Korea, Republic of|Mexico|Poland|Puerto Rico|Spain|Sweden|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Czechia|Estonia|France|Germany|Italy|Netherlands|New Zealand|Poland|Puerto Rico|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Canada|Czechia|Estonia|France|Germany|Italy|Netherlands|New Zealand|Poland|Puerto Rico|Spain|Sweden|United Kingdom 1
United States|Australia|Bulgaria|Canada|Germany|Hungary|Italy|New Zealand|Romania|Turkey 1
United States|Canada|Germany|Puerto Rico 1
United States|Egypt 1
Uzbekistan 1

Sites per Study

Site_count Study_Count
1 283
2 19
3 10
4 9
5 4
6 5
7 4
8 3
9 5
10 3
11 4
12 2
14 1
16 1
17 1
18 2
19 2
21 2
22 1
25 1
26 2
27 2
28 1
30 1
33 1
34 1
37 2
39 1
43 1
45 2
46 1
53 1
57 1
58 1
59 1
61 1
66 1
70 1
72 1
74 1
75 1
84 1
86 1
88 1
90 1
101 1
104 1
106 1
125 1
156 1
161 1
170 1
249 1
261 1
266 1
272 1
290 1
323 1
325 1
388 1
402 1

Number of Updates

Count of Versions Count of Studies
1 41
2 64
3 64
4 39
5 21
6 15
7 21
8 5
9 13
10 8
11 3
12 13
13 4
14 6
15 7
16 5
17 1
19 1
20 5
22 1
23 3
24 4
25 2
26 1
27 1
28 2
29 1
30 2
31 1
33 3
34 2
36 1
37 1
38 2
39 3
40 1
42 2
43 1
44 2
45 1
49 1
53 2
56 1
58 2
60 3
63 1
64 1
66 1
67 2
69 1
70 1
73 1
74 1
78 1
81 1
83 1
88 1
89 1
90 1
91 1
103 1
108 1
115 1
119 1
126 1
128 1
211 1
440 1
461 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 6052 366 16.535519
Contacts/Locations 1548 281 5.508897
Study Design 641 287 2.233449
Recruitment Status 549 290 1.893103
Study Description 549 159 3.452830
None (earliest Version on record) 407 407 1.000000
Eligibility 347 185 1.875676
Sponsor/Collaborators 234 148 1.581081
Outcome Measures 214 153 1.398693
Study Identification 211 143 1.475524
Groups 167 126 1.325397
Interventions 167 126 1.325397
Oversight 145 105 1.380952
More Information 124 36 3.444444
References 120 65 1.846154
Conditions 82 61 1.344262
Results 71 71 1.000000
IPDSharing 43 43 1.000000
Baseline Characteristics 28 19 1.473684
Documents 18 18 1.000000
Results Submission Events 13 13 1.000000
Participant Flow 11 9 1.222222
Reported Adverse Events 11 10 1.100000

Enrollment Metrics

Measure Observational
Min 1.000
1st Qu 87.500
Median 300.000
Mean 4156.183
3rd Qu 881.000
Max 815000.000

Observation Model

observational_model Study_Count
Cohort 256
Case-Only 42
NA 42
Other 22
Case-Control 19
Case Control 14
Ecologic or Community 8
Family-Based 2
Case-Crossover 1
Defined Population, Natural History 1

Time Perspective

time_perspective Study_Count
Prospective 279
Retrospective 57
Cross-Sectional 30
NA 22
Other 18
Longitudinal, Prospective 1

Registries

Studies by Country

Country Study_Count
China 7
NA 4
Korea, Republic of 2
Spain 2
United States 2
Argentina|Austria|Belarus|Belgium|Bosnia and Herzegovina|Croatia|Czechia|Denmark|Estonia|Finland|France|Georgia|Germany|Greece|Hungary|Iceland|Ireland|Israel|Italy|Latvia|Lithuania|Luxembourg|Netherlands|Norway|Poland|Portugal|Romania|Russian Federation|Serbia|Slovakia|Slovenia|Spain|Sweden|Switzerland|Ukraine|United Kingdom 1
Austria|Belgium|Brazil|Georgia|Germany|Greece|Italy|Moldova, Republic of|Pakistan|Romania|Spain|Vietnam 1
Cameroon 1
Chile 1
Egypt 1
France 1
Germany 1
Italy 1
Japan 1
Switzerland 1
United States|Australia|Belgium|Germany|Italy|New Zealand|Russian Federation|United Kingdom 1
United States|Australia|Canada|France|Germany|Italy|New Zealand|Puerto Rico|Spain|United Kingdom 1
United States|Canada 1
United States|Puerto Rico 1

Sites per Study

Site_count Study_Count
1 20
3 1
13 1
15 1
18 2
27 1
30 1
45 1
48 1
110 1
138 1

Number of Updates

Count of Versions Count of Studies
1 9
2 7
3 3
5 4
6 1
7 1
10 2
14 1
25 1
26 1
35 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 154 22 7.000000
Contacts/Locations 66 18 3.666667
None (earliest Version on record) 31 31 1.000000
Recruitment Status 21 14 1.500000
Study Design 21 12 1.750000
Outcome Measures 13 10 1.300000
Study Description 12 8 1.500000
Eligibility 8 5 1.600000
Oversight 7 7 1.000000
Sponsor/Collaborators 7 6 1.166667
Study Identification 6 5 1.200000
Groups 4 4 1.000000
Interventions 4 4 1.000000
Documents 3 3 1.000000
Results 3 3 1.000000
IPDSharing 2 2 1.000000
References 2 2 1.000000
Conditions 1 1 1.000000

Enrollment Metrics

Measure Registries
Min 54.00
1st Qu 315.50
Median 500.00
Mean 8211.29
3rd Qu 1304.50
Max 200000.00

Registry Model

observational_model Study_Count
Cohort 24
Case-Control 3
Case-Crossover 1
Case-Only 1
Other 1
NA 1

Time Perspective

time_perspective Study_Count
Prospective 24
Cross-Sectional 3
Other 3
NA 1

Follow-up

target_duration Study_Count
5 Years 7
10 Years 4
1 Year 3
1 Day 2
24 Weeks 2
10 Months 1
144 Weeks 1
2 Weeks 1
2 Years 1
20 Years 1
3 Months 1
3 Years 1
30 Years 1
4 Years 1
48 Weeks 1
6 Months 1
62 Months 1
64 Weeks 1